一株耐酸L-乳酸生产菌的Co^(60)诱变选育  

Screening of an Acid Tolerant Lactobacillus acidophilus strain by Co^(60) Mutagenesis

作　　者：李检秀[1] 孙靓[1] 陈东[1] 郭铃[1] 黄艳燕[1] 孙菲菲[1] 

机构地区：[1]广西科学院非粮生物质酶解国家重点实验室国家非粮生物质能源工程技术研究中心广西生物炼制重点实验室,广西南宁530007

出　　处：《广西科学》2011年第4期392-395,共4页Guangxi Sciences

基　　金：广西科学院基本科研业务费项目(10YJ25SW11)资助

摘　　要：对嗜酸乳杆菌(Lactobacillus acidophilus)CICC 6005菌株进行Co60诱变,从突变体中选育得到1株生长快速的耐酸突变菌株LS-8。该菌株在pH值3.6的条件下发酵72h、在pH值3.8的条件下发酵104h,L-乳酸产量分别达9.2g/L和16.5g/L。Originally from Lactobacillus acidophilus CICC 6005,an acid tolerance mutant strain LS-8 was obtained by Co60 mutagenesis and the selected strain had high growing speed as target.At pH value 3.6 and 3.8,the yield of L-lactic acid by fermentation of LS-8 for 72h and 104h were 9.2g/L and 16.5g/L,respectively,which revealed much higher than that of reported investigation.

关 键 词：嗜酸乳杆菌 Co60诱变 L-乳酸酸性发酵 

分 类 号：TQ921[轻工技术与工程—发酵工程]